package netty.groupchat;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

import java.util.Scanner;

public class GroupChatClient {
    private static String host;
    private static int port;
    public GroupChatClient(String host, int port) {
        this.host = host;
        this.port = port;
    }
    public void run() {
        NioEventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(group)
                    .channel(NioSocketChannel.class)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            ch.pipeline().addLast("decoder", new StringDecoder())
                                    .addLast(new GroupChatClientHandler())
                                    .addLast("encoder", new StringEncoder());
                        }
                    });
            Channel channel = bootstrap.connect(host, port).sync().channel();
            Scanner scanner = new Scanner(System.in);
            while (scanner.hasNextLine()) {
                String msg = scanner.nextLine();
                channel.writeAndFlush(msg + "\r\n");
            }
            channel.closeFuture().sync();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        GroupChatClient client = new GroupChatClient("localhost", 7777);
        client.run();
    }
}
